Spiral pipe



Sept. 26, 1933. E, H, YLO 1,928,118

SPIRAL PIPE Filed Sept. 16, 1929 Edward H 2 10,

, 25 specification:

Patented Sept. 26,1933 t I I UNITEDSTATES PATENT cmcsy Edward H. Taylor, GhicagofIll.

Application September 16, 1929 Serial No. 392,999

2 Claims. (01. 137;

This invention relates to pipes, and more parsive agent is being conducted through the pipe. I ticularly to a spiral pipe. I i I These two strips are initially'formed into a unit Spiral pipe is ordinarily made of sheet iron, strip stock which permits bothof them to be spi--.

, mild steel, or other material that will give a rally wound at the same time. The strip stock I 8 strong body to the pipe. These materials are is made by facing the bottom surface of thebbdy not satisfactory, however, when it'becomes necstrip with a strip of substantially non-corrodible essary to use the pipe or conduit for acids, alkamaterial which is secured in place by folding its"; I lines, and other corrosive agents. For this reaedge 3 and Figure Over the ed es 5"and 6 ,I son, the material of which the pipe is constructed espect v y of th y Strip l pi the 10 should be one having non-corrodible properties. inwardly turned ends againstthe top surface If the desired bodily strength is to beobtained thereof-i The unit stockstrip is wound into a j 1 in the pipe, a material of suitable thickness must spiral with the adjacent edges of the convolu-- be used. If the pipe is constructed entirely of tions thus formed either overlapp,ing,,,as shown a material having non-corrodible properties, its gure 0 a u ti as Shown inFigllre 3, 'de-. cost becomes very high. 1 j pending upon the type o joint desired, and a It is, therefore, an object of this invention to sp eam ade'by which l rv s provide an improved pipe for conducting corro-. to. additionally secure the substantially non-corsive fluids. r I I i rodible strip to the'b'ody strip and seals the joint. I

A further object of this invention'is to provide It is to be noted that in eithertype O joint their 20 a pipe having suflicient bodily strength to stand dy ta is Completely P t c y the 1 up underuse and be'substantially non-co'rrodible. a ia y n Odibl metal o h a i Other and further important objects of this lining strip, th join Co in b ween the invention will be apparent from the disclosures substantially non-corrodible S p forming h 1 in the accompanying drawing and the following g 0 the p pe I By the use of this invention, an improved pipe The invention (in a preferred form) is illusis provided having sufficient strength to stand up trated inthe drawing and hereinafter more fulin us and 'a e sam time be su ta l f r. c n ly described. ducting corrosive agents. I r

On the drawing: I l I I am aware thatmany changes may be made, 30 Figure 1 is longitudinal section through a and numerous. details of construction may bef j spiral pipe embodying this invention. Varid throu a W d range W t-dep rting Figure 2 is a fragmentary view in section showfrom t Principles of this invention, n I thereing the preferred form of joint used in the imfore. (10 1101? P p limiting the patent a ed proved pipe. .hereon, otherwise than as vnecessitatedby the 35 Figure 3 is a fragmentary view in section show- .pri r a ting a modified joint. I I claim as myinvention: I II Figure 4 is the same as Figure 3 except that-the 1. In a pipe, a spirally wound body strip, a spi- I welding on the joint is shown. rally wound lining strip having its adlacent,.lat;-.,

Figure 5 is a transverse section of the pipe eral portions deflected outwardly between-the ade I 40 showing the substantially non-corrodible lining. jacent edges'of said body strip and back against Figure 6 is an end elevational view of a strip theouter surface of said body strip, ;and.a weld. of the pipe material showing the substantially for securing said deflected portions together. and v I non-corrodible lining secured to the body strip. to, saidedges. I I v 1 f .As shown on the drawing: 2. In a spiral pipe, a spirally wound body strip 45 In the illustrated embodiment of this invenhaving overlapping joint portions,'a separate lintion, there is shown in Figure 1 a spirally wound ing strip'coveringthe inner surface-of the body 1" strip 1 of the ordinary metal used in spiral pipes; strip, said liningstrip vhavingfone edge folded j I l which serves as a body for the pipe and is made of over one edge of the body strip, and the other, edge' I suitable thickness to give the pipe whatever portion of said liningstrip extending between the 50 strength is desired. A lining is provided on the overlappin joint'portions, said overlapping. joint i inner surface of the pipe by a spiral strip 2 of portionsbein'g welded together.- I a substantially non-corrodible metal. JIhi s lining, EDWARD. H. TAYLOR. if desired, need be only a fraction of the thick- 1 1 ness of the body strip, since its principal purpose I I i A I 5 r 55 is to protect the body strip from whatever corroi I I 

